InformationSheet Digi-Pulse™ Flow Monitor Series FM-200

Information Sheet
Digi-Pulse™ Flow Monitor
Series FM-200
Corrosion resistant PVDF
Senses pulsating metering pump flow
Adjustable, in-line
Flow range:
Max. LMI Pump Output
0.05 - 5.0
7.9 GPH (30.0 l/h)
Usable as Adjustable Flow Switch for non-pulsating flow
For LMI pumps with 3/8" check balls, non-LiquiPro™ liquid ends
Pulsating flow of your pump can be monitored and transmitted using the
LMI Digi-Pulse™ Flow Monitor. Designed to electrically signal a low
flow or no flow condition, you can be assured of your pumping
performance; an advantage when working with pulsating or very low
flows. A transmitter can be connected to a remote counting or recording
device. The FM-200-9 transmitter is wired to be plugged directly into
the receptacles of Series A9/B9/C9 pump housings. The Digi-Pulse™
Flow Monitor is adjustable to any desired pulsating flow rate within its
Flow Range
Max. Pulse
(stroke) Rate
Max. Pressure
Max. Load
Cable Length
Body Material
Valve Fitting
Seals & O-Rings
Max LMI pump output
0.05 - 5.0
7.9 GPH (30.0 l/h)
Model No.
FM- 200
Supplied without valve fitting (for use w/4FVs)
100 per minute
150 psi (10 Bar)
For pressure over 150 psi, consult factory.
Supplied without valve fitting (for use with
Series A9/B9/C9 pumps.)
FM -201
Supplied w/ PVDF valve connection for 1/4" OD tubing
FM -202
Supplied w/ PVDF valve connection for 3/8" OD tubing
FM -203
Supplied w/ PVDF valve connection for
/2" OD tubing (or 9 x 12 mm)
FM -204
Supplied w/ 1/4" NPT male PVDF valve housing
FM -205
Supplied w/ fitting and Metric Tubing Adapter Kit
3 x 6 mm PE Tubing
4 x 6 mm PE Tubing
FM -206
Supplied w/ fitting and Metric Tubing Adapter Kit
6 x 8 mm PE Tubing
6 x 12 mm PVC Tubing
Reed Switch (No Flow = N.O. Switch Condition)
Polarity Independent
Minimum pulse width 15 msec
100 mA AC or DC, 36V max.
10 ft (3 m) (except FM-200-9)
FM-200-9 : Cable Length 20 in (0.5 m)
Carbon Fiber Reinforced PVDF (where supplied)
Polyprel (PTFE copolymer)
201 Ivyland Road
Ivyland, PA 18974 USA
TEL: (215) 293-0401
FAX: (215)293-0445
Replaces same of Rev. H 7/01
1708.I 2/07
Instruction Sheet
Digi-Pulse™ Flow Monitor
The valve fitting on the discharge portion
of the Digi-Pulse™ Flow Monitor must be
a flange type fitting to ensure a proper
seal with the O-Ring. Using a winged
type valve fitting will not create a seal
and leakage of solution will occur.
With your pump turned off, screw the lower valve fitting of
the Digi-Pulse™ Flow Monitor to the discharge side of the
pump head.
FM-200 and FM-200-9: Remove the Caplug from the top
of the Digi-Pulse™. Be sure to save the O-Ring seal and
install it onto the mating end of the valve housing or 4FV
you will be using. Attach your 4FV or valve housing to the top
of the Digi-Pulse™.
Loosen the locknut of the flow-range knob of the flow
monitor and set the knob to the largest dot. Start the pump
and adjust it (calibrate, if necessary) for proper output to
satisfy your system requirements.
With the pump running, gradually turn the adjustment knob
until the sensor
of the flow monitor counter-clockwise
just begins to trigger your electronic device.
This will be the most sensitive setting of the Digi-Pulse™,
given your pump setting and fluid properties. Every stroke of
the pump will output enough volume of solution to cause the
Digi-Pulse™ flow monitor to register a pulse. If the flow drops
below the initial pump setting, the Digi-Pulse™ will no longer
register strokes to your electronics, indicating some type
of pump failure or low-level condition.
All other models: Attach tubing or pipe to top of valve
Connect the Digi-Pulse™ cable to your counter, computer,
or other recording device (polarity is not critical). If cable
extension is desired, consult factory. Plug the FM-200-9
cable directly into the receptacle in the Series A9/B9/C9
pump housing.
Tighten the adjustment locknut without altering the
adjustment position.
After the initial pump and Digi-Pulse™ setup is complete, any
adjustment of the stroke length of the pump (output per
stroke) will require a readjustment of the Digi-Pulse™ Flow
Monitor (repeat steps 4 - 6 above).
To change the flow range setting:
A set screw holds the transmitter body in a notch on the side
of the flow monitor. Remove the screw and washer and slide
or turn the transmitter 180° to an alternate position and tighten
the screw and washer in the hole to secure the transmitter. The
Digi-Pulse™ Flow Monitor comes factory set at the “LOW”
setting which should accommodate most applications. However, the “INTERMEDIATE” or “HIGH” settings may be
appropriate for a particular application if the sensor does not
trigger in the “LOW” setting.
© 2001 LMI Milton Roy - All Rights Reserved
Printed in USA
Specifications subject to change without notice.
Digi-Pulse and LiquiPro are trademarks of Liquid Metronics Incorporated